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On January 1, 2020, an entity had an opening bank balance of $500 million. During the period it issued shares and received a total of $250 million. No other transaction affected the bank balance for the said period. The entity's trial balance also reported trade receivables before making adjustments for the provision for bad debt. The trade receivables balance was $ 150 million. However, the opening provision was $15 million and company experienced a decrease in provision for bad debt of $5 million. The only other current assets were inventory and prepaid expenses of $25 million and $75 milion respectively. Determine the total current assets as at December 31, 2020. Select one: a. $980 million b. $900 million c. $990 million d. $890 million